Disc wheels



Aug. 4, 1959 H. KORDES 2,898,142

DISC WHEELS Filed July 16, 1957 [n venfar MW Mi Zl/aZZm M, W1 20m UnitedStates Patent DISC WHEELS Heinrich Kordes, Osnabruck, Germany, assignorto Klockner Georgsmarienwerke, Aktiengesellschaft, Osnabruck, GermanyApplication July 16, 1957, Serial No. 672,178

(Ilaims priority, application Germany May 22, 1957 4 Claims. (Cl. 29511)The present invention relates to disc wheels more especially for use inrailway rolling stock, of the type provided with resilient insertionsstressed principally for compression, said insertions being interposedbetween two outer acute-angled surfaces of a wheel rim and the innersurfaces of a V-section annular flange connected with the wheel boss.

In the specification of my co-pending patent application No. 592,872,filed June 21, 1956, there is described one form of disc wheel of thetype referred to in which the wheel rim is of V-section and the likewiseV-section annular flange connected with the wheel boss comprises twosimilar, correspondingly angled sheet metal discs joined together byWelded dowel pins and connected with the wheel boss welded seams, andthat the insertions consist of a mouldable elastic synthetic plasticmaterial.

The above described form of wheel provides a disc wheel of very lightWeight, especially inexpensive to manufacture and having optimumproperties of resilience, in which the elasticity of the resilientinsertions is put to practical use.

The present invention has for an object to provide an addition to, ormodification of the invention claimed in my said co-pending patentapplication, thereby to make it possible to manufacture disc wheels ofthe type de scribed in a particularly advantageous and economic manner,and according to the present invention the aforementioned annularflanges are provided with a female thread which engages a male tread ona web member of the wheel boss.

In a preferred embodiment of the present invention the requisite tightfit between the aforementioned threads is achieved by a shrinkingoperation which in its turn is advantageously assisted by under-coolingthe wheel boss and if desired, slightly heating the annular flanges atthe same time.

One form of disc wheel according to the invention will now be describedwith reference to the accompanying drawings, in which:

Figure 1 is a cross-section of a fully assembled wheel body omitting itsassociated tyre;

Figure 2 is a detail showing the blank from which the annular flanges ofFigure 1 are formed and comprising a rolled section of substantiallyV-shaped cross-section; and

Figure 3 is a cross-section similar to Figure 1 showing the assembledwheel body before the interposed resilient insertions are givencompressive pretension.

As will be seen fi-om Figure 1, the wheel body according to the presentinvention comprises, as in the construction described in thespecification of my said copending application, a wheel rim 5 forsupporting the tyre (not shown) and which is made in one piece and is ofV-shaped cross-section; along its inner periphery the wheel rim 5 has anumber, for example, three, of equally spaced lugs 6. Each of the saidlugs has a bore 6' ex 2,898,142 Fatented Aug. 4, 1959 tendingtherethrough with which are associated bores 2a and 2b respectively inthe annular flanges 12, 13 associated with the boss 11, 18 of the wheel,and in the interposed resilient insertions 4, 4 (made of an elasticplastic) said bores, in the position of the components shown in Figure1, being in line with the bore 6'. A screw bolt (not shown) inserted inthe aforementioned bores pro- 'vides a direct connection between theWheel rim 5 and the annular flanges 12, 13 in the manner of a bridgeextending across the resilient insertions 4, 4'. This bridge has twopurposes: on one hand, it facilitates the perfect machining of the wheelbody components and more especially of the tyre after the insertions 4,4' have been fitted; and on the other hand, it is possible with theaforementioned screw bolts to give the insertions a certain compressivepretension, though this desirable pretension can, of course, be producedequally well by means of other devices or arrangements.

However, whereas in the case of the construction of my said co-pendingapplication, the wheel boss and the associated annular flanges areconnected together by welding and by means of welded dowel pins, theannular flanges being, moreover, designed as suitably beaded rings ofsheet metal, the present invention proposes to use a blank for makingthe annular flanges and comprising a rolled section 14 of V-shapedcross-section as shown in Figure 2. Advantageously, this rolled sectionis machined and then separated along the annuli 15, 16, into twocongruent rings of annular flanges 12, 13 (Figures 1 and 3), and each ofthese rings is then provided on the inside, that is to say on the sidefacing the boss, with a female thread 17 (Figure 3). The web portion 18of the boss 11 is provided with a mating male thread. Dowel pins 19(Figure 3) ensure perfect centering and fixing of the two annularflanges 12, 13' during the machining as well as during the applicationof the compressive pretension to the resilient insertions 4, 4'.

What I claim is:

1. A disc wheel for use in railway rolling stock and the like,comprising a hub and web portion associated therewith, said web portionhaving a peripheral annular surface with a thread thereon, a pair ofannular flanges which together form a V-shape in cross section and eachhaving an internal thread meshing with the thread on the web portion, apair of inclined inserts of resilient plastic material, and a V-shapedwheel rim in contact with the inserts and having internally extendinglugs in spaced relation at the apex of the V-shaped rim, said flanges,inserts and the lug having concentric holes therein to receive bolts tosecure the parts together.

2. A disc wheel according to claim 1, in which the flanges are providedwith spaced dowelpins to center the annular flanges.

3. A disc wheel according to claim 1, in which the hub and web portionare integral with each other.

4. A disc wheel according to claim 1, in which the flanges are providedwith spaced dowel pins to center the annular flanges and in which thehub and web portion are integral with each other.

References Cited in the file of this patent UNITED STATES PATENTS1,076,591 Lotte Oct. 21, 1913 2,659,622 Watter Nov. 17, 1953 2,755,138Brink July 17, 1956 FOREIGN PATENTS 833,583 France July 25, 1938

